Table 2 Effectiveness of decontamination on Legionella bacterial loading
From: Legionella on board trains: effectiveness of environmental surveillance and decontamination
Month | Mean of load value (CFU/l) (post-decontamination period) | Mean of bacterial load in natural logarithmic numbers | t | p |
|---|---|---|---|---|
October 2008 | 992.2414 | 6.9000 | 0.6591 | 0.2550 |
November 2008 | 583.8235 | 6.3696 | 1.1843 | 0.1183 |
December 2008 | 397.0000 | 5.9839 | 1.6083 | 0.0541 |
January 2009 | 320.1613 | 5.7688 | 1.8698 | 0.0309 |
February 2009 | 295.1282 | 5.6874 | 2.1259 | 0.0169 |
March 2009 | 306.3265 | 5.7247 | 2.3673 | 0.0091 |
April 2009 | 315.3801 | 5.7538 | 2.5402 | 0.0056 |
May 2009 | 295.0256 | 5.6871 | 2.7428 | 0.0031 |
June 2009 | 417.9909 | 6.0355 | 2.7060 | 0.0035 |
July 2009 | 498.4615 | 6.2115 | 2.6624 | 0.0039 |
August 2009 | 554.6850 | 6.3184 | 2.6735 | 0.0038 |
September 2009 | 592.1561 | 6.3838 | 2.6817 | 0.0037 |
October 2009 | 753.6237 | 6.6249 | 2.4677 | 0.0069 |
November 2009 | 752.5163 | 6.6234 | 2.5500 | 0.0055 |
December 2009 | 748.6751 | 6.6183 | 2.6023 | 0.0047 |
January 2010 | 726.0479 | 6.5876 | 2.7144 | 0.0034 |
February 2010 | 934.4538 | 6.8400 | 2.3195 | 0.0103 |
March 2010 | 962.5000 | 6.8695 | 2.3432 | 0.0097 |
April 2010 | 1369.3270 | 7.2221 | 1.3341 | 0.0912 |
May 2010 | 1314.9530 | 7.1816 | 1.4680 | 0.0712 |
June 2010 | 1521.4860 | 7.3274 | 1.0917 | 0.1376 |
July 2010 | 1482.9550 | 7.3018 | 1.1885 | 0.1174 |
August 2010 | 1707.7110 | 7.4429 | 0.7837 | 0.2167 |
September 2010 | 1697.6230 | 7.4370 | 0.8044 | 0.2107 |
October 2010 | 1684.2690 | 7.4291 | 0.8432 | 0.1996 |
November 2010 | 1635.7890 | 7.3999 | 0.9556 | 0.1697 |
December 2010 | 1719.8530 | 7.4500 | 0.8037 | 0.2109 |
January 2011 | 1721.6250 | 7.4510 | 0.8141 | 0.2079 |